Effect of temperature on simultaneous separation and extraction of hemicellulose using p-toluenesulfonic acid treatment at atmospheric pressure

Feng, Chengqi; Zhu, Jiatian; Hou, Ya‐Jun; Qin, Chengrong; Chen, Wangqian; Nong, Yuhao; Liao, Zhangpeng; Liang, Chen; Bian, Huiyang; Yao, Shuangquan

doi:10.1016/j.biortech.2022.126793

Cited by 50 publications

(18 citation statements)

References 44 publications

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“…According to this model, the separation of lignin is carried out layer by layer. In fact, the absence of cellulose in the reaction was found in a previous study [ 13 ]. This means that the reaction of organic acids with cellulose can be ignored.…”

Section: Resultssupporting

confidence: 58%

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Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid

Deng

Luo

Peng

et al. 2022

IJMS

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As a green and efficient component separation technology, organic acid pretreatment has been widely studied in biomass refining. In particular, the efficient separation of lignin by p-toluenesulfonic acid (p-TsOH) pretreatment has been achieved. In this study, the mechanism of the atmospheric separation of bagasse lignin with p-TsOH was investigated. The separation kinetics of lignin was analyzed. A non-simple linear relationship was found between the separation yield of lignin and the concentration of p-TsOH, the temperature and the stirring speed. The shrinking nucleus model for the separation of lignin was established based on the introduction of mass transfer and diffusion factors. A general model of the total delignification rate was obtained. The results showed that the process of lignin separation occurred into two phases, i.e., a fast stage and a slow stage. The results provide a theoretical basis for the efficient separation of lignin by p-TsOH pretreatment.

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Section: Resultssupporting

confidence: 58%

“…This was attributed to the effective inhibition of the unproductive adsorption of enzymes by lignin [ 12 ]. The structural transformation of lignin was analyzed after p -TsOH pretreatment [ 13 ]. The results indicated that lignin is transformed into a β-O-4-linked α-methoxylated intermediate utilizing p -TsOH autocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid

Deng

Luo

Peng

et al. 2022

IJMS

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“…The reaction solutions were analyzed for the presence of vanillyl alcohol and veratryl alcohol using high-performance liquid chromatography (Agilent 1260, Agilent, Palo Alto, CA, USA). For this purpose, 10 μL of each sample was injected at a flow rate of 0.5 mL·min −1 into the column oven set at 35 °C, and an ultraviolet detector operating at 280 nm was employed [ 43 ]. Elution conditions were ultrapure water (with 0.1% formic acid) and acetonitrile (90/10, v / v ), elution time was 20 min.…”

Section: Methodsmentioning

confidence: 99%

Effects of the Preferential Oxidation of Phenolic Lignin Using Chlorine Dioxide on Pulp Bleaching Efficiency

Liu

Deng

Liang

et al. 2022

IJMS

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Chlorine dioxide is widely used for pulp bleaching because of its high delignification selectivity. However, efficient and clean chlorine dioxide bleaching is limited by the complexity of the lignin structure. Herein, the oxidation reactions of phenolic (vanillyl alcohol) and non-phenolic (veratryl alcohol) lignin model species were modulated using chlorine dioxide. The effects of chlorine dioxide concentration, reaction temperature, and reaction time on the consumption rate of the model species were also investigated. The optimal consumption rate for the phenolic species was obtained at a chlorine dioxide concentration of 30 mmol·L−1, a reaction temperature of 40 °C, and a reaction time of 10 min, resulting in the consumption of 96.3% of vanillyl alcohol. Its consumption remained essentially unchanged compared with that of traditional chlorine dioxide oxidation. However, the consumption rate of veratryl alcohol was significantly reduced from 78.0% to 17.3%. Additionally, the production of chlorobenzene via the chlorine dioxide oxidation of veratryl alcohol was inhibited. The structural changes in lignin before and after different treatments were analyzed. The overall structure of lignin remained stable during the optimization of the chlorine dioxide oxidation treatment. The signal intensities of several phenolic units were reduced. The effects of the selective oxidation of lignin by chlorine dioxide on the pulp properties were analyzed. Pulp viscosity significantly increased owing to the preferential oxidation of phenolic lignin by chlorine dioxide. The pollution load of bleached effluent was considerably reduced at similar pulp brightness levels. This study provides a new approach to chlorine dioxide bleaching. An efficient and clean bleaching process of the pulp was developed.

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“…Biomass-based hydrogels are naturally biocompatible and biodegradable and have strong molecular design and functional modification properties . High-performance hydrogel materials have been obtained by multiple network hydrogels, nanocomposite hydrogels, topological hydrogels, and hydrogen bond-enhanced hydrogels. , Hemicellulose is a natural polysaccharide derived from lignocellulosic biomass with natural biodegradability, biocompatibility, and low immunogenicity. − In general, the presence of a large number of hydroxyl groups in the molecular chain is the most obvious structural feature of hemicellulose as a natural polysaccharide, which makes hemicellulose extremely easy to be modified. In addition, hemicellulose is more soluble in water than other biomasses (cellulose, lignin, etc.)…”

Section: Introductionmentioning

confidence: 99%

Polydopamine-Reinforced Hemicellulose-Based Multifunctional Flexible Hydrogels for Human Movement Sensing and Self-Powered Transdermal Drug Delivery

Yao

Luo

et al. 2023

ACS Appl. Mater. Interfaces

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The preparation of bio-based hydrogels with excellent mechanical properties, stable electrochemical properties, and self-adhesive properties remains a challenge. In this study, nano-polydopamine-reinforced hemicellulose-based hydrogels with typical multistage pore structures were prepared. The nanocomposite hydrogels exhibit stable mechanical properties and show no significant crushing phenomenon after 1000 cycles of cyclic compression. Its ultimate tensile strain was 101%, which is significantly higher than that of native skin. The shear adhesion strength of the hydrogel to skin tissue reaches 7.52 kPa, which is better than fibrin glue (Greenplast) (5 kPa), and the excellent adhesion property prolongs the service time of the hydrogel in biomedicine applications. The impedance of the hydrogel was reduced and the electrical conductivity was increased with the addition of nano-polydopamine. The prepared nanocomposite hydrogel can detect various body movements (even throat vibrations) in real time as a motion sensor while being able to rapidly load cationic drugs and facilitate transdermal introduction of electrically stimulated drug ions as a drug patch. It provides theoretical support for the fabrication of hemicellulose-based hydrogels with excellent properties through molecular design and nanoparticle reinforcement. This has important implications for the development of next-generation flexible materials suitable for health monitoring and self-administration.

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Effect of temperature on simultaneous separation and extraction of hemicellulose using p-toluenesulfonic acid treatment at atmospheric pressure

Cited by 50 publications

References 44 publications

Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid

Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid

Effects of the Preferential Oxidation of Phenolic Lignin Using Chlorine Dioxide on Pulp Bleaching Efficiency

Polydopamine-Reinforced Hemicellulose-Based Multifunctional Flexible Hydrogels for Human Movement Sensing and Self-Powered Transdermal Drug Delivery

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